I found that restarting xport brings it back up for me every time. This makes me think it's a com issue, not a GPS lock issue. Will probably make a shortcut to kill and restart xport in RR.

In my situation the problem was the GPS received just wouldn't lock on to any satellites. The red light would blink sometimes indicating it locked on but after a reboot the light would remain solid. It looks like I just have a finicky GPS receiver that wants to be outside of my dash whereas my last receiver was content remaining under my dash next to the motherboard. Oh well, it has been a few weeks now and so far so good.